— I don’t understand why you didn’t go to the lecture yesterday afternoon.—I’m so sorry. But I _________ my homework. 
#100590
A
had done
B
was doing
C
would do
D
am doing
推荐题目
Edward, you play so well, but I          you played the piano.
#101742
A
don’t know
B
hadn’t know
C
didn’t know
D
haven’t known
Frank_________ London by train which _______ at 8:30 next morning.
#101792
A
is leaving for ; will leave
B
is leaving for; leaves
C
will leave for; will leave
D
leaves for ; leaves
Whenever Steve sang in the shower, his voice _______ throughout the house.
#100876
A
has rung
B
would ring
C
was ringing
D
had rung